Rotary pump



(No Model.)

W. B. ALLYN. ROTARY PUMP.

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TV'ILLIAM B. ALLYN, OF BOSTON, MASSACHUSETTS.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 385,832, dated July 10, 1888.

Application filed January 17, 1887.

T0 @ZZ whom it may concern/.

Be it known that I, WILLIAM B. ALLYN,of Boston, in the county of Suffolk and State of Massachusetts, have invented a certain new and useful Improvement in Rotary Pumps, of which the following is a specicatiomreferenee being had to the `accompanying drawings, in which- Figure 1 is a sectional elevation of my invention'on the line X X of Fig. 2. Fig. 2 is also a sectional elevation of the same on the line YY of Fig. 1. Fig. 3 is a detached perspective view of the piston and links. Fig. 4 is an interior view of one side of the casing, showing the ports and a section at the top in which are shown chambers for attaching the inlet and outlet pipes; and Fig. 5 is a sectional elevation of the invention, showing the ports and an arrangement of water-passages and upper chambers.

Like letters refer to likeparts in the several figures.

This invention pertains to improvements upon a rotary pump, for which I have obtained Letters Patent of the United States No. 104,403, dated. June 21, 1870, and No. 146,741, dated January 27, 1874.

The objects of my improvements are, first, to avoid undue friction heretofore caused between tlie sliding abutment and the bearingsurface of the slot receiving the same; and, secondly, to obviate the necessity of forming an opening in the web of the piston, which is liable to become choked by sediment.

The invention consists of thc combinations of parts, including their construction, substantially as hereinafter fully set forth, and pointed out in the claims.

In carrying out my invention I construct the piston g g with a peripheral ilangc, H,ar ranged in alignment and formed solidly with the web G ofthe piston. Disposed in the upper part of the casing are abutments J J, arranged so as to cause their inner ends to stand endwise closely to the flange Il of the piston g g. Upon the sides of the flange H opposite the slots in the piston g g is pivoted a link or links, S S', connecting it with the easing a in such a manner that while the piston will be permitted to have the requisite movement the abutments J J will be prevented from having Serial Ned2/1,642. (No model.)

contact with the surfaces of the slots in the piston. The addition of the fiange II to the piston admits of the use of separate abutments, one arranged upon each side of the flange and web thereof, while the use of the separate abutments renders unnecessary the formation of an opening in the web G, in which the abutment heretofore worked. Ihe flange H extends entirely around the piston, and is of sufficient width to prevent it leaving the circumferential recess I in the casing a, thereby preventing the water from passing back through the same.

The piston is actuated by a driving-shaft, B, having a rectangular portion or surface, upon which is fitted an eccentric, E. The cccentric works in a bearing or flanges, M'M'.

formed with the web G, and which can bc eX- tended more or less, as desired. Between the shaft B and the eccentric E is interposed a spring, c, which allows the piston to pass over small obstructions liable to enter with the water.

In order to provide room or space for the bearing or flanges M M and the eccentric E, recesses F F are furnished between the fianges D D, which extend inwardly from the casing to the web G of the piston.

This pump may be provided with waterchambers at the top which would serve as a convenience inthe attachment of the inlet and outlet pipes.

Ports I? I), fourin number, may also be supplied to the casing a, one being disposed upon each side of each ofthe abutments J J and connecting by passages with the aforesaid chambers, as shown in Figs. 1. and 5.

As the pump can be reversed, the ports on either side of the abutments can serve as inlets or outlets.

If desired, rectangular passages may be provided leading directly from the chambers of the pump and connecting with the upper chambers, as shown by dotted lines and arrows in Figs. L and 5.

Longitudinal Wear may be taken up by interposing elastic packing between the sections of the casing, as shown at n n, Fig. 4,wliich will allow said sections to be drawn together more or less,and adjusted by means of bolts and setscrews.

IOO

In operation it will be seen that when power is applied to the shaft B and the piston is actuated by the eccentric E the links S S', while permitting the piston to have the requisite movement, will prevent it from turning or the abutments J J from coming into contact with the surfaces of the slotsrin the piston. My pump is applicable to blowers and motors constructed on the same principle, and by placing two or more on the same shaft the moving` parts may be easily balanced and steam be used expansively.

I do not claim the eccentric-actuated piston without the peripheral fiange and with an abutment extending through an'opening in its Web'or with any passages through it for Water, as these have been before used; but

What I claim, and desire to secure by Let ters Patent, is-

l. In a pump, the combination, with a casing having the circumferential recess and in- Wardly-projecting flanges, of the piston having the peripheral flange arranged coincidently with and entering said recess, links connecting the flange with the casing, and abutnients, substantially as set forth.

2. In a pump, the combination, with a casing having the circumferential recess and inwardly-projecting iianges. of the piston having the peripheral iiange arranged coincidently with and entering said recess, linksconneeting the flange with the casing, and abutmenis disposed endwise and closely to the sides of said flange, substantially as set forth.

3. In a pump, the combination, with a casing having the circumferential recess and inwardly-projecting flanges, of the' piston having the bearing or iianges and the peripheral flange, the abutments disposed endwise and closely to the sides of said peripheral flange of the piston, the shaft fitted with a springcushioned eccentric interposed between the shaft and the said bearing, and the links connecting the piston-flange with the casing,sub stantially as set forth.

WILLIAM B. ALLYN.

Witnesses:

Oris ROGERS, SAMUEL N. PIPER. 

